Strain and tear are completely different Both has different healing periods... 3 lines near armpit to chest..!? are those bruises how did it happen all these I should know before I can suggest you any exercises

Need physical assessment. After that it will take mild a week moderate 2-3 weeks , severe 6-8 weeks

Hey there! Strain and tear are completely two different terms. Kindly consult online for diagnosis and treatment plan.

Depending on grade of injury  recovery will be there Mild - 2 weeks Moderate -3 to 6 week Severe - 3 month

Need to know when did you got this mark, to confirm whether it's a tear or not need property assessment, is there any pain or inflammation.

Did u get it during exercise or some sport? As u explained i think it's not a tear or strain it's just a stretch mark, please send the pic

Rest from pushing or lifting Apply ice for 10–15 minutes, 3 times daily Gentle pendulum movements for the shoulder Pain-free passive stretching of the pectoral region Begin isometric pectoral contractions (pain-free). Scapular retraction exercises Active-assisted shoulder flexion and abduction within pain-free limits Progress to resistance band chest flies and wall push-ups. For better treatment and diagnosis please consult online

Pectoralis major muscle strain recovery time depends on the severity: • Grade I (mild strain): 2–3 weeks with rest, ice, and gentle stretching. • Grade II (partial tear): 4–6 weeks with gradual strengthening and physiotherapy. • Grade III (complete tear): May take 3 months or more and might need surgical evaluation. Since you noticed visible lines near the armpit to chest, it suggests possible fiber tearing or bruising. Avoid upper body workouts (especially chest and pushing exercises) until assessed. Apply ice in the first 48 hours, then switch to warm compresses. Gentle pain-free shoulder movements can prevent stiffness. Consult in person for grading, ultrasound or MRI confirmation, and a graded rehab program focusing on stretching, strengthening, and posture correction.

what do you mean by 3 lines if its possible kindly get a consultation nearby physiotherapist or get a online consultation the radiant clinic Indiranagar Bangalore

Hi please take an online consultation for best diagnosis and treatment .

First of all you need to confirm tear grade . Then only it treatment time can be decided