There are many reasons for urticaria, an allergic disease, including systemic diseases such as various foods, drugs, infections, chemicals and physical factors. Treatment and prevention only need to find and avoid allergens, but some urticaria can't define what allergens are; If it is urticaria caused by infection and other diseases, it will disappear when the disease is cured. In the acute stage of urticaria, most of them only need to use antihistamines to fight allergic reactions. After treatment, most urticaria will be relieved within 48 hours. A few urticaria will recur. When the rash lasts for more than six weeks, it is called chronic urticaria and usually requires steroid treatment.

It may be the cause of dry skin. The weather is dry in winter and spring, especially in spring, and the skin will peel off.

2, when changing seasons, the skin is easy to lack water, so I suggest you replenish water, and then pay attention to maintenance, skin care products are oily.

Applying Li Yumin Skin Cream (available on Taobao) can immediately relieve dry skin, moisturize fair skin, calm and moisturize.

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Violet, alias: grass osmanthus, peach, grass violet, Rich flowers? 、? Violet? Purple-blue Latin name: Matthiola? Inca card? (l .)？ r？ Cruciferae and violets in Great Britain are biennial or perennial, and the whole plant is densely covered with gray peduncle branches. The stems are erect, multi-branched and slightly lignified at the base. Leaf blade oblong to oblanceolate or spoon-shaped, native to coastal areas. Widely cultivated in southern China. It is the general name of various plants of the genus Violet in Cruciferae. It is one of the famous flowers in Europe. It is widely introduced in big cities in China, and can be planted in garden flower beds or greenhouses for viewing. This kind of flower is similar to pansy and easy to be confused.

morphological character

Biennial or perennial herbs? , up to 60 cm long, the whole plant is densely covered with gray-white stalks. Violet stems are erect, multi-branched and slightly lignified at the base. Leaf blade oblong to oblanceolate or spoon-shaped, petiole 6-14cm long and1.2-2.5cm wide, whole or microwave-shaped, with obtuse or rarely short tip at the top and tapering to stalk at the base. The raceme is terminal and axillary, with many and large flowers, and the inflorescence axis is elongated in fruit; Pedicels are stout and spread obliquely, reaching 1.5 mm; Sepals erect, oblong, about 65438 05 mm long. The inner sepals are saccate at the base, membranous at the edge and white and transparent. Petals are purplish red, reddish or white, nearly ovoid, about 12 mm long, with shallow cracks or dimples at the top and wavy edges and long claws at the bottom; Filaments gradually expand to the base; Ovary cylindrical, stigma slightly 2-lobed. Silique is cylindrical, 7-8 cm long, about 3 mm in diameter, with obvious midvein and shallow crack at the top; The fruit stalk is stout and long 10- 15 mm. The seeds are nearly round, about 2 mm in diameter, flat and dark brown, with white membranous wings at the edge. The flowering period is April-May.

Violets are native to the coast of China. At present, it is widely cultivated in southern China. ? Herbaceous flowers, biennial or perennial, are usually sown in the autumn of the first year and bloom in the spring of the second year. The plant height is 30-60 cm, the whole plant is soft with gray stars, the stem is upright, and the base is slightly lignified. The leaves are broad, oblong or oblanceolate, and the apex is obtuse. The raceme is terminal and axillary, with stout pedicels and purple, red, yellow and white flowers. Single flowers can bear seeds, but double flowers can't bear seeds. The fruit is cylindrical in silique, and the seed has wings. The flowering period is from March to May, and the fruit ripening period is from June to July.

Growth habit

I prefer a cold climate to a hot one. The optimum growth temperature is 15-20℃ during the day and 10℃ at night. Violent flower buds need a low temperature cycle of 5-8℃, and the requirements for soil are not strict, but they grow well in neutral and alkaline soil with good drainage and avoid acidic soil. Violet is cold-resistant, not tolerant of shade and afraid of waterlogging. Suitable for living in an environment with high position, contact with sunlight and good ventilation and drainage. Avoid muggy weather, hot weather, and diseases and insect pests are prone to occur when ventilation is poor. Require fertile, moist and deep loam; I like sunshine, but I am also a little tolerant of semi-shade; Fertilization should not be too much, otherwise it will be bad for flowering; If the light and ventilation are not sufficient, pests and diseases are easy to occur.

diversification

There are many varieties of gardening, including single-petal and double-petal varieties. Double petal strain has high ornamental value; Single-petal strain can bear seeds, but double-petal strain can't. Plants planted with flat seeds usually produce a large number of double flowers; And full of seeds, most plants make a single flower. Colors are pink, crimson, light purple, deep purple, pure white, light yellow, bright yellow, blue purple and so on. Cut flowers are usually made of white flowers, pink flowers and purple flowers in production.